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Asked:18 Oct 2025

Motion Control System SIMOTION: Motion axis Parameter Number

Hello,
I am using D445-2 with SINAMICS S120 and I'm trying to read axis parameters with PLCopen FB (_MC_ReadParameter). "PLCopen Blocks" manual shows how to use it and gives a couple of parameter numbers as examples but there is no parameter number under Expert List for the rest of them. How/where can I find parameter number for axis parameters (i.e. TypeOfAxis)?
Thank you!

#sosflex #Motion Control System SIMOTION #siemens
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Answers(1)
Siemens Test Added an Answer on18 Oct 2025

Reading Axis Parameters with SINAMICS S120 and PLCopen

You're right to notice the discrepancy between the PLCopen manual examples and the availability of parameter numbers in the Expert List for the SINAMICS S120 with D445-2.

The parameter numbers for use with the PLCopen FB (_MC_ReadParameter) are different from those in the standard Expert List. They are specifically defined for the PLCopen interface.

You can find the complete list of parameter numbers for PLCopen in the following documentation within SiePortal:

  • SINAMICS S120 Firmware Manual: PLCopen interface parameters - This document explicitly maps PLCopen parameters to their corresponding numbers.

You can access the document using this link.

Specifically, look for the section detailing the parameters applicable to axis configuration, which includes "TypeOfAxis" and other relevant settings.

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